Preparation and photoluminescence properties of perovskite Cs4PbBr6/CsPbBr3 quantum dots integrated into lithium-borosilicate glass

Quantum dots (QDs), like all inorganic perovskite cesium lead bromide Cs4PbBr6 and CsPbBr3, have shown potential as multifunctional optoelectronic materials. However, their lack of stability precludes any further practical uses from being developed. Glass as a carrier can effectively resolve these problems while retaining excellent luminescent properties. Herein, a novel perovskite Cs4PbBr6/CsPbBr3 QDs embedded in lithium borosilicate glass was prepared. The phase transition mechanism of Cs4PbBr6/CsPbBr3-based QDs in lithiumborosilicate glass with varying concentrations of Li2O was investigated. Increases in the size and quantity of QDs with increasing contents of Li2O were analyzed using transmission electron microscopy (TEM). A narrow photoluminescence (PL) emission band was observed, with a substantial emission intensity shift and a red-shifted luminescence peak. After 30 days of immersion in water, the QDs maintained approximately 84% of their luminescence intensity. According to the results, the perovskite Cs4PbBr6/CsPbBr3 QDs embedded into lithium borosilicate glass have promising future applications in display technology.